Pavement



(NoModeL) R. J'. CARSON.

PAVEMENT.

No. 598,670. Patented Feb. 8, 1898.

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UNITED STATES PATENT FFICE.

ROBERT J. CARSON, bF NEW YORK, N. Y., "ASSIGNOR TO THE IRON-GLAD ASPHALTPAVING COMPANY, OF NEW YORK.

PAVEMENT.

SPECIFICATION forming part of Letters Patent No. 598,670, datedFebruary8, 1898. Application filed February 17, 1897. Serial No. 623,768. (Nomodel.)

To all whom it may concern:

Be it known that I, ROBERT J. CARSON, a resident of New York city,county and State of New York, have invented certain newand usefulImprovements in Pavements, of which the following is a specification.

The object of my invention is to provide paving frames, blocks, orsections for use in connection with asphalt or other suitable pav- 1oing material, whereby'a rigid surface may be produced in connection withthe paving material, so as to prevent ruts and depressions from formingin the pavement.

The invention consists in a frame, block,

or section composed of a series of bars that able paving material isplaced in the paving frames or blocks either before or after laying theframes on a foundation to fill the spaces 0 between the several curvedor sinuous bars and to cover them to a slight degree, if desired. Bysuch an arrangement a smooth roadwaymay be produced wherein asphalt andiron alternate in supporting wheels and 5 other traffic.

The invention also consists in the novel details of improvement and thecombinations of parts, that will be more fully hereinafter set forth,and then pointed outin the claims.

Reference is to be had to the accompanying drawings, forming parthereof, wherein- Figure 1 is a plan view of one of my improved pavingframes or blocks. Fig. 2 is a section on the line 2 2 in Fig. 1, lookingin the direction of the arrows at a; and Fig. 3 is a section on the line3 3 in Fig. '1, looking in the direction of the arrows b b.

In the accompanying drawings, in which similar numerals of referenceindicate corresponding parts in the several views, 1 and 2 are barswhich are curved in and out sinuously, serpentinely, or in double-ogeeform,

as clearly shown in Fig. 2that is-to say, these bars are curved upwardlyand downwardly or corrugated, whereby one convex portion 1 will beadjacent to a concave portion 1 As shown, the surfaces of the convexportions 1 of the part 1 are substantially on a plane to constitute a.tread for wheels, &c., and the surfaces of the concave portions 1 ofpart 1 are also on a plane to form a base to rest upon a foundation. Bypreference I the parts 1 and 2, which are practically alike, alternatein position on a right line-that is to say, the convex portions 2 of onebar 2 are in line with the concave portions 1 of the adjacent bar 1, andthe concave portions 2 of one bar are in line with the convex portions 1of the adjacent bar. By this means the several convex surfaces 1 and 2form a surface which is broken by the spaces between the several parts 1and 2, as seen in Fig. 1; but the relative positions of the parts 1 1 22 may vary from those shown. These curved or sinuous bars are placedvertically 7 5 that is to say, the curves run up and down' therebyforming trusses.

The several parts 1 and 2, which constitute the main portion of thepaving frames, blocks, or sections, are connected together in a firm andrigid structure by suitable intermediate connecting parts. These parts Ihave shown in the form of arms 3, and by preference the bars 1 and 2 andthe connecting-arms 3 are all cast in a single structure of suitablemetalsueh as cast-iron, for instancethe whole constituting my improvedpaving frame, block, or section.

Suitable means may be provided for inter locking the contiguous oradjacent edges of the several paving-frames which are to be placed sideby side to constitute a road-bed.

I have shown the frame as provided at one end with outwardly-projectinglugs or cars 4,

which, by preference, will be a continuation 5 ofthe corresponding bar 1or 2. At the 0pposite end of the frame is an extension or lug 5, thelugs 4t and 5 being arranged to overlap one another when the frames areside by side, so that one frame will have a bearing on another. The sideor sides of the frame adja- IOO cent to the sides having the lugs 4 and5 will also, by preference, be provided with suitable lugs 6, arrangedso that those on one side will overlap those on the opposite side of theadjacent frame; but the frames that lie contiguous to the curb need nothave the lugs 6.

In constructing a pavement embodying my invention a suitable foundation,say, of concrete with or without a top layer of asphalt will first bemade, and then my improved paving frames or blocks, either before orafter being filled with paving material, will be laid thereon side byside, so as to cover the surface of the foundation or road-bed, the lugsat the sides of the several frames being caused to interlock. A suitablepaving materialsuch as asphalt, concrete, or the like--is next filled inupon the blocks or sections so laid, if the blocks have not beenpreviously filled, and then rolled as usual in laying pavements. It willbe understood that this paving material will pass through the openingsor spaces 7, Fig. 1, which are shown between the several bars 1 and 2,and will also surround the latter. By preference a layer of pavingmaterial will be spread over the surface of the bars to conceal them.With this arrangement as a wheel travels over the road it will find abearing on one or more of the convex portions 1 and 2 of the bars 1 and2, and the presence of these bars in the road will prevent ruts anddepressions from forming therein. The presence of the blocks or sectionsin the material of the roadway will prevent the paving material fromdisplacement or creeping under the action of loads and ofthe elements inconjunction therewith. The convex surfaces of the bars 1 and 2 will alsoafford a foothold for horses shoe-calks and will materially assist themin drawing loads over a smooth pavement. As the sinuous or doubly-curvedbars 1 and 2 form trusses, great strength is secured in thepaving-frames with a minimum of metal, the advantage of which will beapparent when it is considered that heavy loads must travel over theseframes, while the cost mu st be as low as possible. Therefore by havingthe paving-frames of curved or sinuous bars connected together bysuitable crossarms a paving-frame can be made that will be sufiicientlystrong to withstand the rough usage to which it may be put, while at thesame time the cost will not be so great as to prevent its practical use.

I do not limit my invention to the precise details shown, as the barsmay have any other suitable curves than those shown, if desired, and maybe connected together in any other suitable manner, and other suitablemeans may be provided for interlocking the adjacent bars together.

Having now described my invention, what I claim is 1'. A frame to befilledv with paving material, composed of a series of curved or sinuousbars forming trusses connected together, the curves of said barsextending in a plane perpendicular to the surface or tread of the frame,the convex portion of one bar alternating with the concave portion ofanother bar, and spaces between said bars adapted to receive pavingmaterial, substantially as described.

2. A frame to be filled with paving material, composed of a series ofcurved or sinu- .ous bars, which curves or sinuosities extend rial,composed of a series of curved or sinuous bars, having their curvesextending in a plane perpendicular to the surface or tread of the framethereby forming trusses, certain of said bars at opposite sides of theframe being extended outwardly, the one over and the other under, tointerlock when the frames are placed adjacent to each other,substantially as described.

Signed at New York city, in the county of New York and State of NewYork, this 16th day of February, A. D. 1897.

ROBT. J. CARSON.

Witnesses:

T. F. BOURNE, F. V. LEVY.

